CN2456414Y - Video/audio signals automatic switch - Google Patents
Video/audio signals automatic switch Download PDFInfo
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- CN2456414Y CN2456414Y CN 00268657 CN00268657U CN2456414Y CN 2456414 Y CN2456414 Y CN 2456414Y CN 00268657 CN00268657 CN 00268657 CN 00268657 U CN00268657 U CN 00268657U CN 2456414 Y CN2456414 Y CN 2456414Y
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Abstract
The utility model relates to an automatic video/audio signal switcher, which is mainly composed of an automatic video/audio signal switching circuit, and additionally comprises a signal switching circuit that is provided with a plurality of branched video/audio signal input terminals, a video detection circuit that is used for detecting the input video/audio signals, a coder that is respectively connected to the signal switching circuit and the video detection circuit, and a voltage-stabilizing circuit that supplies each circuit with power. The video detection circuit is used for detecting which video/audio signal input terminal has signal input, and the coder controls the signal switching circuit to carry out switching operations, so that the signals are sent out from output terminals. The signals are then presented on a screen through a modem, and the troublesome operations of switching a video/audio signal source by a remote controller or manually are avoided.
Description
The utility model is about a kind of video sound signal automatic switchover device.
Each family all quite payes attention to the amusement seeing and hearing enjoyment now, so having multiple different video audio frequencies broadcast in oneself video audio frequency combination is unite for example DVD, VCD, video game device etc., yet, the video sound signal input terminal of establishing in the television set do not ask because quantitatively often not applying institute, thereby need the outer signal switch to scoop out, signal shifter then need use a teleswitch or manual mode goes to switch the signal of importing to select, or often need pull out the input terminal that changes television set so that use.But such using method, its service routine is miscellaneous, and causes the fault of input terminal easily, and is obviously very inconvenient for the user who has multiple audio/video (A/V) input demand.
Therefore, the purpose of this utility model is to provide a kind of video sound signal automatic switchover device that detects the input video sound signal and carry out automatically switching channels, it can automatically switch and select the A/V vision signal of extremely last start, and need not the application remoting device and manually switch.
For achieving the above object, video sound signal automatic switchover device of the present utility model, it comprises: a signal switching circuit, formed by a switching circuit connection video audio frequency input and output terminal and modulator-demodulator; One Video Detection loop is made up of corresponding video input terminal number of video detecting unit, and it connects and the detection video input signals; One encoder, its input are the outputs that is connected to the Video Detection loop, and output is connected to the commutation circuit of signal switching circuit; And a loop of voltage regulation, to be formed by a pressurizer, its output is to be connected to described each circuit.
Because described video sound signal automatic switch-over circuit is commutation circuit connection video audio frequency input terminal and encoder and modulator-demodulator by a signal switching circuit, when the Video Detection loop detects wherein a video audio frequency input terminal signal input is arranged, promptly deliver to encoder, produce a control signal by its coding and deliver to commutation circuit, and its input signal is changed the back send to carry out channel by lead-out terminal and switch, and make signal export television set to by a modulator-demodulator or video audio frequency lead-out terminal.Like this, can make television set under many group A/V signal input states, when start, produce and detect automatically and the Switch Video function, make its video sound signal source that automatically switches to last start, with the inconvenience of avoiding manually or remote control is switched.
For further understanding the purpose of this utility model, characteristics and advantage, below with reference to accompanying drawings a preferred embodiment of the present utility model is elaborated.
Fig. 1 is the circuit diagram of the video sound signal automatic switchover device of the utility model one preferred embodiment.
Relevant detailed circuit part of the present utility model sees also Fig. 1, as shown in the figure, video sound signal automatic switchover device of the present utility model, it is made up of video sound signal automatic switch-over circuit, and it comprises:
One signal switching circuit 10 switches by one that circuit 101 is connected with many group video input terminals 11～13 and a modulator-demodulator 106 is formed; One Video Detection loop 30 is to be connected with the video input terminal 11～13 of respectively organizing on signal switching circuit 10 inputs, and its output then is connected to encoder 20; One encoder 20, the information translation that Video Detection loop 30 is detected becomes a control signal and delivers to signal switching circuit 10; One loop of voltage regulation 40 is made up of a pressurizer 41, is used to supply the voltage in each loop.Wherein,
This signal switching circuit 10 is to be connected with many group video input terminals 11～13, to be organized L channel input terminal 14～16 more and organize R channel input terminal 17～19 more by commutation circuit 101, the output of commutation circuit 101 is to modulator-demodulator 106, and the input of commutation circuit 101 then connects the output of encoder 20; Video Detection loop 30 is made up of the three groups of video detecting unit 301,302,303 that are connected with described each video input terminal 11～13 respectively, each is organized video detecting unit 301,302,303 and mainly is made up of 31～33 in a PNP transistor respectively, its base stage is connected to video input terminal 1113 corresponding in the signal switching circuit 10 respectively, and its collection utmost point then is connected to the input of encoder 20;
This encoder 20 is output signals that receiver, video detects loop 30 again, and its output is connected to the input of the commutation circuit 101 in the signal switching circuit 10;
And loop of voltage regulation 40 to be a pressurizer 41 one ends inputs be connected to one 8 volt DC power supplys, this output is connected to the video detecting unit 301～303 in commutation circuit 101, modulator-demodulator 106 and the encoder 20 and the Video Detection loop 30 of signal switching circuit 10, so that working power to be provided.
Detailed circuit structure of the present utility model can be found out by above-mentioned explanation, its circuit working principle will be described below in detail.
When vision signal during by a video input terminal 11 input wherein, video detecting unit 301 corresponding in the Video Detection loop 30 will be delivered to simultaneously, the base stage of its transistor 31 is because of being the high potential conducting at this moment, so make its collection utmost point on the input of encoder 20 the 11st pin, produce a high potential, this moment, encoder 20 will be by the 7th, 9 pin are exported the commutation circuit 101 of 01 low/high potential signal to signal switching circuit 10, sound signal then directly inputs to commutation circuit 101 by audio frequency input terminal 1619, so that make commutation circuit 101 Switch Videos and sound signal to passage 1 (CH1), and vision signal is after carrying out impedance transformation by the 17th pin output of commutation circuit 101 via NPN transistor 102, deliver to television set by modulator-demodulator 106, audio-frequency unit then exports modulator-demodulator 106 to television set by the 1st pin of commutation circuit 101, in addition, video and sound signal also can be directly by video output terminal 103 and audio frequency lead-out terminals 104,105 outputs.
Again after vision signal is by video input terminal 12 inputs, PNP transistor 32 conductings of video detecting unit 302 will be made, make its collection utmost point on the input that is connected to encoder 20 the 12nd pin, produce a high potential, and encoder 20 can be the 7th, produce a high electronegative potential on 9 pin, and export the input the 4th of the commutation circuit 101 of signal switching circuit 10 to, 6 pin, and sound signal is inputed to the input the 14th of commutation circuit 101 by audio frequency input terminal 1518,21 pin, make commutation circuit 101 Switch Videos and sound signal to passage 2 (CH2), video is exported by the 17th pin, and after carrying out impedance transformation by NPN transistor 102, deliver to television set by modulator-demodulator 106, audio frequency then exports modulator-demodulator 106 to television set by the 1st pin of commutation circuit 101, or by video output terminal 103 and audio frequency lead-out terminal 104,105 outputs.
In addition after vision signal is by video input terminal 13 inputs, to drive 33 conductings of PNP transistor via capacitor C 14, make its collection utmost point can on the input that is connected to encoder 20 the 13rd pin, produce a high potential, and encoder 20 can produce high high potentials and by the 7th, 9 pin export the input the 4th of the commutation circuit 101 of signal switching circuit 10 to, 6 pin, and sound signal is inputed to the input the 15th of commutation circuit 101 by audio frequency input terminal 1417,22 pin, make commutation circuit 101 Switch Videos and sound signal to passage 3 (CH3), after the base stage that video exports NPN transistor 102 to by the 17th pin is carried out impedance transformation, deliver to television set by modulator-demodulator 106, audio frequency then exports modulator-demodulator 106 to television set by the 1st pin of commutation circuit 101, or by video output terminal 103 and audio frequency lead-out terminal 104,105 outputs.And loop of voltage regulation 40 is to receive 8 volt direct currents to convert the power supply of 5 volts of voltages for each loop to.
When three groups of video input terminals 11,12,13 input signal together during to video detecting unit 31,32,33, through behind the coding of encoder 20, commutation circuit 101 will switch to the channel of start the latest in regular turn by the channel of starting-up signal at first.
From the above, the utility model is can be when many group vision signals are imported, will automatically switch to incoming video signal or when opening input signal simultaneously, will select the vision signal of start the most slowly as DVD, VCD, LD, not go to switch and need not re-use manual operation.
Claims (5)
1. video sound signal automatic switchover device, it is made up of a video sound signal automatic switch-over circuit, it is characterized in that it comprises:
One signal switching circuit is made up of a switching circuit connection video audio frequency input and output terminal and modulator-demodulator;
One Video Detection loop is made up of corresponding video input terminal number of video detecting unit, and it connects and the detection video input signals;
One encoder, its input are the outputs that is connected to the Video Detection loop, and output is connected to the commutation circuit of signal switching circuit; And
One loop of voltage regulation is made up of a pressurizer, and its output is to be connected to described each circuit.
2. video sound signal automatic switchover device as claimed in claim 1, it is characterized in that, this signal switching circuit is the output that is connected with video input terminal and encoder and video detecting unit by a switching circuit, and the output of this commutation circuit is connected to modulator-demodulator and video audio frequency lead-out terminal.
3. video sound signal automatic switchover device as claimed in claim 1, it is characterized in that this video detecting unit is to be made of a PNP transistor, its base stage is connected to video input terminal, the collection utmost point is connected to the encoder input, and its emitter-base bandgap grading is connected to the output end of voltage stabilizer of loop of voltage regulation.
4. video sound signal automatic switchover device as claimed in claim 1, it is characterized in that, the pressurizer input of this loop of voltage regulation is to be connected with a direct current power supply, and output is connected to the transistorized emitter-base bandgap grading of the PNP of commutation circuit, encoder and video detecting unit.
5. video sound signal automatic switchover device as claimed in claim 1 is characterized in that the output of the commutation circuit of this signal switching circuit is connected to the base stage of a NPN transistor, and its emitter-base bandgap grading is connected to the input of modulator-demodulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268657 CN2456414Y (en) | 2000-12-20 | 2000-12-20 | Video/audio signals automatic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268657 CN2456414Y (en) | 2000-12-20 | 2000-12-20 | Video/audio signals automatic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2456414Y true CN2456414Y (en) | 2001-10-24 |
Family
ID=33622188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00268657 Expired - Fee Related CN2456414Y (en) | 2000-12-20 | 2000-12-20 | Video/audio signals automatic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2456414Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917172A (en) * | 2010-08-19 | 2010-12-15 | 中山美加音响发展有限公司 | System for automatically detecting signal sources |
| CN101325677B (en) * | 2007-06-15 | 2011-05-04 | 深圳Tcl新技术有限公司 | Television capable of implementing automatic switching of signal source |
| CN105898580A (en) * | 2016-04-29 | 2016-08-24 | 广东长虹电子有限公司 | Multipath SCART channel intelligent switching method and television employing same |
| CN106412462A (en) * | 2015-07-31 | 2017-02-15 | 青岛海信电器股份有限公司 | Play signal output control method and play equipment |
-
2000
- 2000-12-20 CN CN 00268657 patent/CN2456414Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325677B (en) * | 2007-06-15 | 2011-05-04 | 深圳Tcl新技术有限公司 | Television capable of implementing automatic switching of signal source |
| CN101917172A (en) * | 2010-08-19 | 2010-12-15 | 中山美加音响发展有限公司 | System for automatically detecting signal sources |
| CN106412462A (en) * | 2015-07-31 | 2017-02-15 | 青岛海信电器股份有限公司 | Play signal output control method and play equipment |
| CN105898580A (en) * | 2016-04-29 | 2016-08-24 | 广东长虹电子有限公司 | Multipath SCART channel intelligent switching method and television employing same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |